Yet another exaggeration regarding Ryanair: if your Standby starts at 05:00 then you should be ready to walk out of the door at that time, therefore you will have been awake from roughly 04:15 - 04:30 at the latest to get yourself ready, yes? Now do Ryanair call you at 02:00 or 03:00? No. They simply give you a heads up, to get into the office, at about the time you would have set the alarm clock anyway. To me that's perfectly reasonable & could be even helpful.
In response to X-centric;
I do not work for RyanAir or never have (so correct me if I am wrong), but is it definitely the case you have to be ready to leave at the beginning of your STBY or as soon as they call to walk out the door? Do you not have a minimum amount of time to report, maybe 1 hour or something? If true, is the above quote not an exaggeration in itself? Maybe some people live close to work and can get up, ready and into work within an hour?